code: def _eval_innerproduct_BarBra(self, bra):
      return I
  
imports: from sympy.core.numbers import I, Integer
  from sympy.physics.quantum.innerproduct import InnerProduct
  from sympy.physics.quantum.dagger import Dagger
  from sympy.physics.quantum.state import Bra, Ket, StateBase
label_desc: Use image node_id 3 for calling the FooKet obj's underlying member method code with example usage: obj._eval_innerproduct_BarBra(bra) and returns: I